William francis hyatt



(No Model.)

W. F. HYATT.

- LOCK.

No. 464,023. Patented Dec. 1, 1891.

Fry 2,

WITNESSES guards a formed integral with it.

NITED STATES PATENT OFFICE.

\VILLIAM FRANCIS IIYATT, OF BROOKLYN, NE\V YORK.

LOCK.

SPECIFICATION forming part of Letters Patent No. 464,023, dated December1, 1891.

Application filed June 15, 1891. Serial No- 396,295. (No model.)-

To allruhom it may concern:

Be it known that I, IVILLIAM FRANCIS IIYATT, of Brooklyn, in the countyof Kings and State of New York, have invented a certain new and usefulImprovement in Locks of which the following is a specification.

This invention relates to posts and keys of locks; and it consists in ametal post having guards formed upon it and a key constructed to engagewith said post. p

I will describe a lock embodying my improvement, and then point out thenovel features in claims.

In the accompanying drawings, Figure 1 is a side elevation of a post andkey embodying my invention. Fig. 2 is a vertical section of the postwith the key in place, and Fig. 3 is a top View of the post.

Referring by letter to the drawings, A designates the post, secured atone end to a portion of the lock-case A in any desired manner. This postA is formed of solid metal and has The post and guards may be firstformed by the process of drawing, which, however, instead. of providingseveral independent guards, will form a longitudinal rib. This rib maythen have the notches a cut in it, and thus form the independent guardsc. There maybe one or more of the guards at, the number beingimmaterialto my invention.

The key B is of flat metal and has notches bin its body portion adaptedto pass over the guards at asthe key is revolved around the post.

As a means to keep the key in a position relatively to the axis of thepost I provide it with a tang b, which may be extended into a hole (6 inthe upper end of the post. Obviously by inserting the tang 1) into thehole a the key may be revolved around the post in such manner that itsbody portion or lower end will engage with and operate a bolt ortumblers of a lock. 1 I have shown the post as provided at its outer endwith a head or flange O, which is notched, as at c, for the passage ofthe body of the key, andthe key is provided with a notch c, suificientlywide to admit the thickness of the flange 0.

Having described my invention, what I claim is- 1. A lockpost having anoutwardly-extending guard or guards thereon for use in com-

